Nucleosynthesis and the variation of fundamental couplings

Details Nucleosynthesis and the variation of fundamental couplings Nucleosynthesis and the variation of fundamental couplings

2004-05-19

arxiv.org/abs/astro-ph/0405373v1

Phys.Rev.D70:083504,2004

Astronomy and Astrophysics

Astrophysics

8 pages, no figures

Scientific paper

10.1103/PhysRevD.70.083504

We determine the influence of a variation of the fundamental ``constants'' on the predicted helium abundance in Big Bang Nucleosynthesis. The analytic estimate is performed in two parts: the first step determines the dependence of the helium abundance on the nuclear physics parameters, while the second step relates those parameters to the fundamental couplings of particle physics. This procedure can incorporate in a flexible way the time variation of several couplings within a grand unified theory while keeping the nuclear physics computation separate from any model-dependent assumptions.

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